2.0.1: Improve interoperability with applications written in languages like …

…JavaScript.

2.0.0: Update minimum Swift version to 5.9 and add visionOS to the list of s…

…upported platforms.

1.0.1

Update `MessagePackReferenceImplementation` to version 1.0.1.

1.0.0: Initial release.

- `MessagePackEncoder` to serialize a `Codable` value to MessagePack bytes.
- `MessagePackDecoder` to deserialize a `Codable` value from MessagePack bytes.
- `MessagePackTimestamp` to represent MessagePack timestamp values.
- `CodableAsMessagePackExtension` to implement application-specific MessagePack extension types.